[1] The territory has since been administrated as the Ust-Orda Buryat Okrug of Irkutsk Oblast.

In a referendum held on April 16, 2006, the majority of residents in Irkutsk Oblast and Ust-Orda Buryat Autonomous Okrug agreed to the unification of the two regions.

According to regions' electoral commissions, 68.98% of residents of Irkutsk Oblast and 99.51% of residents in Ust-Orda Buryatia took part in the vote, making it one of the best attended plebiscites in the country since the 2003 Russian election.

The merger was approved by an absolute majority of the electorate: by 89.77% in Irkutsk Oblast and by 97.79% in Ust-Orda Buryatia.

The okrug is divided into six administrative districts: This Irkutsk Oblast location article is a stub.